The graptolites were preserved in the Ordovician deposits of western Texas, especially some of the stratigraphic units of the Trans-Pecos region.
32.
The Oligocene Mineta Formation of Arizona is one of only seven fossil footprint-bearing stratigraphic units of that age in the western United States.
33.
In southeastern Alabama, northern Florida, Georgia, and South Carolina, the stratigraphic units are grouped into the Lisbon-Avon Park Composite Unit.
34.
Geochronological units are periods of time and take the same name as standard stratigraphic units but replacing the terms upper / lower with late / early.
35.
A geological map of the Majella Mountain was compiled on a 1 : 25, 000 scale which showed the distribution of the main stratigraphic units.
36.
The Van Eyck Formation, which is the most distinctive of the circum-Caloris stratigraphic units, was called the Caloris lineated terrain by Trask and Guest.
37.
A new geological map of the Majella Mountain was compiled on a 1 : 25, 000 scale which showed the distribution of these newly defined stratigraphic units.
38.
Several stratigraphic units have been distinguished at the volcanic field, including the Valley unit exposed in the Maule valley and the Lake unit found around the lake.
39.
Cutting II-IV were excavated in 1990; while Cutting I had been excavated in arbitrary splits; Cuttings II-IV were excavated in true stratigraphic units.
40.
The Lecho is part of the Upper / Late Cretaceous Balbuena Subgroup ( Salta Group ), which is a near-border stratigraphic unit of the Andean sedimentary basin.
